Landscape effects of transgenic cotton on non-target ants and beetles
Landscape effects of transgenic cotton on non-target ants and beetles
复制标题
DOI：
10.1016/j.baae.2008.10.010
复制
发表时间：
2009-01-01
影响因子：
3.8
通讯作者：
Marsh, Stuart E.
中科院分区：
文献类型：
--
作者：
Carriere, Yves;Ellers-Kirk, Christa;Marsh, Stuart E.
从苏云金芽孢杆菌（Bt）中产生毒素的转基因作物可以在同一块地里种植多年，许多利用这种作物的昆虫必须分散到其他栖息地才能生存。因此，转基因作物种植的影响可能会随着时间的推移而积累，并影响整个农业景观中的昆虫种群。我们监测了亚利桑那州中部邻近农田的84个非耕作地点的7个蚂蚁属和甲虫科以及稀有蚂蚁和甲虫的种群密度。我们评估了短期（在种植年）和长期（超过5-6年）的景观效果的农业Cry 1Ac棉油蚁和甲虫密度在非耕地的网站，除了几个地方和区域变量。景观变量（例如，在邻近田地中种植的作物的顺序、作物多样性和丰富度）比局部变量（例如，植物生产力和多样性在非耕地）。在短期内，使用Bt相对于非Bt棉花在邻近领域的一个蚂蚁和两个甲虫组在非耕地的密度呈正相关。但在非种植区，Bt棉种植面积比非Bt棉种植面积对蚂蚁和甲虫种群密度的影响更大。从长期来看，转基因棉花在邻近农田种植的年份比例与蚂蚁密度呈正相关，但与甲虫密度无关。结果表明，在邻近领域的Bt棉花种植经常导致积极的短期和长期的景观效果，油蚂蚁和甲虫在非耕地网站，而Bt棉花种植较远的地方有较少的负面短期影响。(c)2009 Gesellschaft fur Okologie.由Elsevier GmbH出版。All rights reserved.
Transgenic crops producing toxins from Bacillus thuringiensis (Bt) can be planted in the same field for many years, and many insects exploiting such crops must disperse to other habitats to persist. Accordingly, effects of transgenic crop farming could accumulate through time and affect insect populations across agricultural landscapes. We monitored the population density of seven ant genera and beetle families and of rare ants and beetles in 84 non-cultivated sites abutting agricultural fields in Central Arizona. We assessed the short-term (during planting year) and long-term (over 5-6 years) landscape effect of farming Cry1Ac cotton oil ant and beetle density in non-cultivated sites, in addition to several local and regional variables. Landscape variables (e.g., sequence of crops planted in neighbouring fields, crop diversity, and abundance) were more frequently associated with insect density than local variables (e.g., plant productivity and diversity in non-cultivated sites). In the short-term, use of Bt relative to non-Bt cotton in neighbouring fields was positively associated with density of one ant and two beetle groups in non-cultivated sites. However, acreage of Bt cotton located within I kill from non-cultivated sites had more negative effects than acreage of non-Bt cotton on density of one ant and one beetle group. In the long-term, the proportion of years that Bt cotton was planted in neighbouring fields was positively associated with ant density but not beetle density. Results Suggest that the farming of Bt cotton in neighbouring fields frequently resulted in positive short- and long-term landscape effects oil ants and beetles in non-cultivated sites, while Bt cotton planted farther away had less frequent negative short-term impacts. (c) 2009 Gesellschaft fur Okologie. Published by Elsevier GmbH. All rights reserved.